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<div class="subTitle">ar.com.hjg.pngj</div>
<h2 title="Class FilterWriteStrategy" class="title">Class FilterWriteStrategy</h2>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="../../../../ar/com/hjg/pngj/IFilterWriteStrategy.html" title="interface in ar.com.hjg.pngj">IFilterWriteStrategy</a></dd>
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<pre>public class <span class="strong">FilterWriteStrategy</span>
extends <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>
implements <a href="../../../../ar/com/hjg/pngj/IFilterWriteStrategy.html" title="interface in ar.com.hjg.pngj">IFilterWriteStrategy</a></pre>
<div class="block">Manages the writer strategy for selecting the internal png predictor filter
 
 TODO: this needs work</div>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><strong><a href="../../../../ar/com/hjg/pngj/FilterWriteStrategy.html#FilterWriteStrategy(ar.com.hjg.pngj.ImageInfo)">FilterWriteStrategy</a></strong>(<a href="../../../../ar/com/hjg/pngj/ImageInfo.html" title="class in ar.com.hjg.pngj">ImageInfo</a>&nbsp;imgInfo)</code>&nbsp;</td>
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<tr class="rowColor">
<td class="colOne"><code><strong><a href="../../../../ar/com/hjg/pngj/FilterWriteStrategy.html#FilterWriteStrategy(ar.com.hjg.pngj.ImageInfo, ar.com.hjg.pngj.FilterType)">FilterWriteStrategy</a></strong>(<a href="../../../../ar/com/hjg/pngj/ImageInfo.html" title="class in ar.com.hjg.pngj">ImageInfo</a>&nbsp;imgInfo,
                   <a href="../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj">FilterType</a>&nbsp;ctype)</code>&nbsp;</td>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../ar/com/hjg/pngj/FilterWriteStrategy.html#computesStatistics()">computesStatistics</a></strong>()</code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj">FilterType</a></code></td>
<td class="colLast"><code><strong><a href="../../../../ar/com/hjg/pngj/FilterWriteStrategy.html#preferedType(int)">preferedType</a></strong>(int&nbsp;rown)</code>
<div class="block">Returns which (actual) filter is recommended to use for this row.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../ar/com/hjg/pngj/FilterWriteStrategy.html#reportResultsForFilter(int, ar.com.hjg.pngj.FilterType, byte[], boolean)">reportResultsForFilter</a></strong>(int&nbsp;rown,
                      <a href="../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj">FilterType</a>&nbsp;type,
                      byte[]&nbsp;rowbfilter,
                      boolean&nbsp;tentative)</code>
<div class="block">Reports the filtered row, so that the strategy can compute statistics.</div>
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<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../ar/com/hjg/pngj/FilterWriteStrategy.html#setPreference(double, double, double, double, double)">setPreference</a></strong>(double&nbsp;none,
             double&nbsp;sub,
             double&nbsp;up,
             double&nbsp;ave,
             double&nbsp;paeth)</code>&nbsp;</td>
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<td class="colFirst"><code><a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj">FilterType</a>&gt;</code></td>
<td class="colLast"><code><strong><a href="../../../../ar/com/hjg/pngj/FilterWriteStrategy.html#shouldTest(int)">shouldTest</a></strong>(int&nbsp;rown)</code>
<div class="block">Returns which filter types should be tested (tried) for this row.</div>
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<h3>Methods inherited from class&nbsp;java.lang.<a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3>
<code><a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</a>, <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</a>, <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</a>, <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</a>, <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</a></code></li>
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<h3>Constructor Detail</h3>
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<h4>FilterWriteStrategy</h4>
<pre>public&nbsp;FilterWriteStrategy(<a href="../../../../ar/com/hjg/pngj/ImageInfo.html" title="class in ar.com.hjg.pngj">ImageInfo</a>&nbsp;imgInfo,
                   <a href="../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj">FilterType</a>&nbsp;ctype)</pre>
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<h4>FilterWriteStrategy</h4>
<pre>public&nbsp;FilterWriteStrategy(<a href="../../../../ar/com/hjg/pngj/ImageInfo.html" title="class in ar.com.hjg.pngj">ImageInfo</a>&nbsp;imgInfo)</pre>
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<h3>Method Detail</h3>
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<h4>shouldTest</h4>
<pre>public&nbsp;<a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj">FilterType</a>&gt;&nbsp;shouldTest(int&nbsp;rown)</pre>
<div class="block"><strong>Description copied from interface:&nbsp;<code><a href="../../../../ar/com/hjg/pngj/IFilterWriteStrategy.html#shouldTest(int)">IFilterWriteStrategy</a></code></strong></div>
<div class="block">Returns which filter types should be tested (tried) for this row. Empty
 if we should not test.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../ar/com/hjg/pngj/IFilterWriteStrategy.html#shouldTest(int)">shouldTest</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../ar/com/hjg/pngj/IFilterWriteStrategy.html" title="interface in ar.com.hjg.pngj">IFilterWriteStrategy</a></code></dd>
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<h4>setPreference</h4>
<pre>public&nbsp;void&nbsp;setPreference(double&nbsp;none,
                 double&nbsp;sub,
                 double&nbsp;up,
                 double&nbsp;ave,
                 double&nbsp;paeth)</pre>
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<h4>computesStatistics</h4>
<pre>public&nbsp;boolean&nbsp;computesStatistics()</pre>
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<h4>reportResultsForFilter</h4>
<pre>public&nbsp;void&nbsp;reportResultsForFilter(int&nbsp;rown,
                          <a href="../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj">FilterType</a>&nbsp;type,
                          byte[]&nbsp;rowbfilter,
                          boolean&nbsp;tentative)</pre>
<div class="block"><strong>Description copied from interface:&nbsp;<code><a href="../../../../ar/com/hjg/pngj/IFilterWriteStrategy.html#reportResultsForFilter(int, ar.com.hjg.pngj.FilterType, byte[], boolean)">IFilterWriteStrategy</a></code></strong></div>
<div class="block">Reports the filtered row, so that the strategy can compute statistics.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../ar/com/hjg/pngj/IFilterWriteStrategy.html#reportResultsForFilter(int, ar.com.hjg.pngj.FilterType, byte[], boolean)">reportResultsForFilter</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../ar/com/hjg/pngj/IFilterWriteStrategy.html" title="interface in ar.com.hjg.pngj">IFilterWriteStrategy</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>rown</code> - Row number</dd><dd><code>type</code> - To which (real) filter this result corresponds</dd><dd><code>rowbfilter</code> - Filtered row (first byte is filter type)</dd><dd><code>tentative</code> - If true, this signals that this is a test/try; if false, we
            confirm that this row is to be written</dd></dl>
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<h4>preferedType</h4>
<pre>public&nbsp;<a href="../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj">FilterType</a>&nbsp;preferedType(int&nbsp;rown)</pre>
<div class="block"><strong>Description copied from interface:&nbsp;<code><a href="../../../../ar/com/hjg/pngj/IFilterWriteStrategy.html#preferedType(int)">IFilterWriteStrategy</a></code></strong></div>
<div class="block">Returns which (actual) filter is recommended to use for this row.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../ar/com/hjg/pngj/IFilterWriteStrategy.html#preferedType(int)">preferedType</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../ar/com/hjg/pngj/IFilterWriteStrategy.html" title="interface in ar.com.hjg.pngj">IFilterWriteStrategy</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>One <a href="../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj"><code>FilterType</code></a></dd></dl>
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